What is the fertilizer to use in march?

In March, a balanced fertilizer with equal parts nitrogen, phosphorus, and potassium (such as a 10-10-10 or 5-5-5) is often suitable for early spring fertilization. For specific needs, a slow-release granular fertilizer can provide nutrients over time. If you are focusing on specific plants, consider a fertilizer formulated for those types, like a higher phosphorus mix for flowering plants. Always follow the instructions on the label for application rates and timing.